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From: ecashin@coe.uga.edu (Ed L. Cashin)
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Subject: Re: [ConTeXt] Math fonts: cal etc.
Date: 06 Jul 1999 11:03:46 -0400
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Hans Hagen <pragma@wxs.nl> writes:

> imagine not being in hmode: 
> 
> \ifmmode -> false -> fast read until \fi -> {\frak#1}
> 
> but in mmode: 
> 
> \ifmmode -> true -> start reading h specs until { expanding everything
> -> meet \fi which ends the \if so ok -> see { -> \hbox{\frak#1} 

OK.  I see now.  Thank you!

> alternatively you can say: 
> 
> \ifmmode\expandafter\hbox\fi{\frak#1}

Hmm.  That's the same as the earlier one, but with "expandafter".
What is the purpose of expandafter there--I know what it is supposed
to do, but isn't expandafter superfluous here, since
"\ifmmode\hbox\fi{\frak#1}" works? 

-- 
--Ed Cashin							
  ecashin@coe.uga.edu